Topic > gadget

It may sound like an impossible dream, but two designers in London have built functioning prototypes of GravityLight, a cheap way for people in developing countries t0 light homes, recharge batteries, or power a radio.

Lytro cameras, the much-hyped photo gadget from a Silicon Valley startup, finally began shipping to customers on Wednesday, four months after the company started taking pre-orders. The cameras use something called light field technology to capture “interactive” images, on which you can change the focus after you take the picture.